<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片主体 -->
    <el-card>
      <!-- 添加角色按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表 -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开列表 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <!-- 一级权限 -->
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <el-col :span="5">
                <el-tag closable @close="removeRightsById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <el-col :span="19">
                <!-- 二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="5">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightsById(scope.row, item2.id)"
                    >{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限 -->
                  <el-col :span="19">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightsById(scope.row, item3.id)"
                    >{{ item3.authName }}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showRightsDialog(scope.row)"
            >分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限对话框 -->
    <el-dialog title="提示" :visible.sync="setRightsDialogVisible" width="30%" @close="setRightsDialogClosed()">
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightsDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="setRights()">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 角色信息列表
      rolesList: [],
      // 分配权限对话框显示/隐藏
      setRightsDialogVisible: false,
      // 权限信息列表
      rightsList: [],
      // 树形控件对象属性
      treeProps: {
        children: 'children',
        label: 'authName'
      },
      // 默认展开选中的节点
      defKeys: [],
      // 当前选中的角色id
      rolesId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取角色列表信息
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.rolesList = res.data
    },
    // 删除对应权限
    async removeRightsById(role, rightId) {
      const confirmRes = await this.$confirm(
        '此操作将永久删除该权限, 是否继续?',
        '删除提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      if (confirmRes !== 'confirm') return this.$message.info('已取消删除')
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      role.children = res.data
    },
    // 显示分配权限对话框
    async showRightsDialog(role) {
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.rightsList = res.data
      this.rolesId = role.id
      this.getLeafRights(role, this.defKeys)
      this.setRightsDialogVisible = true
    },
    // 获取当前角色的所有三级权限
    getLeafRights(node, arr) {
      if (!node.children) return arr.push(node.id)
      node.children.forEach(item => this.getLeafRights(item, arr))
    },
    // 分配权限对话框关闭事件
    setRightsDialogClosed() {
      // 每次关闭对话框时清空数组
      this.defKeys = []
    },
    // 分配权限
    async setRights() {
      const arr = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const str = arr.join(',')
      const { data: res } = await this.$http.post(`roles/${this.rolesId}/rights`, { rids: str })
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightsDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
